Bicycle-lock



ofR. EBERLE. BICYCLE LOGK.

Patented M. 26, 1897.

Mdw

A TTORNEY.

(No Model.)

WITNESSES UNITED STATES PATENT @EErcE.

cHARLES R. EEEELnoE PHILADELPHIA, PENNSYLVANIA.

BICYCLE-LOCK.

SPECIFICATION forming part of Letters Patent No. 592,242, dated October 26, 1897. Application filed September 19,1 8916. Serial No. 606,014. (No model.)

' citizen of the United States, and a resident of Philadelphia, in the county of Philadelphia and. State of Pennsylvania, have invented certain new and useful Improvements in Bicycle-Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in bicycle-locks, and more particularly to that class of locks which are concealed in the frame of the machine and form a permanent fixture.

The object of the invention isto provide a simple, cheap, and effective device for looking the crank-shaft in its hanger and thereby prevent the rotation of the driving-wheel. To these ends the novelty consists in the construction, combination, and arrangement of the same, as will be hereinafter more fully described, and particularly pointed out in the claim.

In the accompanying drawings the same reference-characters indicate the same parts of the invention. 1

Figure 1 is a perspective view of the crankshaft hanger and seat-post tube in which is located my improved lock, the keyhole of which is seen in the upper part of the seatpost tube. Fig. 2 is a longitudinal section of the same. Fig. 3 is a transverse section of the upper part of the seat-post tube and lock. Fig. 4 is a front elevation and side view of the lock-barrel removed from the tube.

A represents the seat-post tube, and B the crailik-shaft hanger, of an ordinary safety-bicyc e. r

N represents the crank-shaft, journaled in the hanger B and provided with a fixed central collar M, havingarectangular transverse groove '11, the parallel sides of which are formed with radial shoulders 42 n.

4 4 represent annular guide-rings fixed on the tube A, and in the rings is concentrically mounted the tubular lock-case O. The upper end of this tubular lock-case G terminates in a longitudinal flat head G, formed with a transverse slot F, which receives the cylindrical hub F of the barrel H, on which said hub is eccentrically mounted the side flanges h. h, extendingon each side of the flat head G to retain the samein place. This hub F is provided with a' journal 71, which has a bearing in an alined orifice in the seatpost tube, and a similar journal 6 on the opposite end of the'hub has a bearing in the opposite wall of the tube. A flat key-slot j extends longitudinally through the journal 72 and into the hub F, and by means of a fiat key (not shown) the barrel may be rotated vto raise or lower the lock-case O in the guiderings 4 4. f

D'represents a circular bolt, the diameter of which corresponds to the width of the groove '12 in thecrank-shaft N, into which it is adapted to enter and prevent Said Shaft from rotating. This bolt D reciprocates in an annular guide-collar 5, fixed in the lower end of the tubular lock-case C.

The shank 6 of the bolt D extends upwardly through a guide-collar 7, fixed in the upper end of thelock-case, and it is provided with a transverse guide-slot a, through which passes a limit-pin oft-he outer ends of which are riveted in the opposite walls of the tubular lock-oase O. A spiral spring 61 encompasses the bolt-shankt, one end resting on the shoulder 8 and the. other end against the cross-pin b. The office of this spring is to normally project theouter end of the bolt D beyond the downward limit of movement of the lockcase, so that when the groove '12 is not in line with the bolt the barrel H maybe rotated to project the lock} case, in which event the end of the bolt will come in contact with the periphery of the collar M, which checks the movement of the bolt, while the spring at allows the lock-case O'to continue to the downward limit of its movement. If the bicycle be now moved backward or forward to bring the groove win the crank-shaft into line with the end of the bolt D, the spring crank-shaft.

Having thus fully described my invention, what I claim as new and useful, and desire to secure by Letters Patent of the United States, 1s-

The tubular seat-post A, and the crankshaft hanger B, the crank-shaft, N, journaled therein and provided with the collar M, having the transverse slot 11 formed with parallel radial walls at n, in combination with the annular guide-rings & 4t fixed in said seat-post B, the tubular lock-case C, mounted in said guide'rings, and provided with the internal annular guide-collars 5 and 7, and the transverse pin, Z), and the bolt, D, mounted in the guide-collar 0, its shank 6 provided with a transverse slot, (1, through which the pin 1) passes and having the end of the shank mounted in the guide collar '7, the spiral spring (Z encompassing said bolt-shank, one end in contact with the pin Z) and the other end resting against the shoulder S 011 the bolt, and means substantially as described for reciprocating said tubular bolt-case and bolt, as and for the purpose set forth.

In testimony whereof I have hereto set my hand in the presence of two Witnesses.

CHARLES R. EBERLE. \Vitnesses:

THos. WILKINSON, J osnrn THOMASSON. 

